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定语从句介词知识点总结介词在定语从句中的使用分为两种情况：一种是介词前置，即介词位于定语从句中引导词的前面；另一种是介词后置，即介词位于定语从句中引导词的后面。
在具体的语境中，要根据不同的情况选择恰当的介词，并确保介词的使用符合语法规则。
一、介词前置情况1. 时间介词的前置在定语从句中，表示时间的介词如at, on, in等通常放在从句的先导词之前。
例如：The day when we met for the first time is still vivid in my memory.（我们第一次见面的那一天在我的记忆中依然清晰）I will never forget the moment when I held my baby for the first time.（我永远不会忘记我第一次抱着我的宝宝的那一刻）2. 原因介词的前置表示原因的介词如because of, due to等也通常放在定语从句中引导词的前面。
例如：The reason why she didn't come to the party is because of her illness.（她没来参加派对的原因是因为生病了）The failure of the project was due to the lack of funding.（这个项目的失败是因为资金不足）3. 地点介词的前置在表示地点的定语从句中，介词如in, at, on等也通常放在引导词的前面。
例如：The place where we met for the first time is now a bustling shopping mall.（我们第一次见面的地方现在成了一个繁华的购物中心）I will never forget the city where I spent my childhood.（我永远不会忘记我度过童年的那座城市）4. 其他介词的前置除了表示时间、原因、地点的介词外，其他表示方式、比较、程度等概念的介词也通常放在定语从句中引导词的前面。
定语从句——介词前置介词---句子当中的动词、形容词完形填空______which/whom非限定性定语从句，介词前置in that——不是定语从句BecauseNow that: since ⏹of with toabout⏹词组搭配Plenty of :Many enough more than enoughAdequateThe classroom big enough 一、二、语法Beautifully red hatSolve problems ---solution to problemsA, B and C——并列结构列举处命题Which of the following is NOT …Bar n 酒吧V 禁止、制止fromstop sb. From doing prevent fromkeep from/offban fromforbid from /to do Forbidden Cityinhibit /prohibit sb. To dopublic transportation system choice /optionoption n. /adj—optional coursecompulsory ---requiredopt- optics opticaloptimal adj. bestoptimal combination optimize optimize the functionavailable /attainable goalsapproachable /access---have access toavailable products /available ladyindustry 工业industries 行业human –humanity ---humanities 人文学科industrial工业的/industrious 勤奋的原则：Number---numerousUtility n. 用途utilities 设备Utilize v. 利用Process n. 进程V 加工、处理Word processorEfficient secretary/effective medicine IndustrializedUndergo: experience UndergoUndertakeUndermine : damage . spoil Score /decade/dozenrnPattern: n 花样、样式、模式The pattern of the curtain Social patternsWork patternsHome patterns Convention ; tradition n.Conventional ; traditionalConference条例、公约International conventionThe medicine works well. The watch works well.A ,B ,andC 并列结构---What does sloppy mean: Short smart lazy邋Six of the ten/in the ten/out of the tenSix tenths名词1，名词2+名扩So that目的So…that 太…以至于，结果He is very good and everyone likes him.He is so good that everyone likes him.So…that/such…thatMinority ;minor Majority: majorStruggle to 努力去做某事Partial: 部分的You are partially right.偏袒的impartial （阅读中的态度题）See you through windows See you through this factAs well as: andAs well : too盛宴TasteEncounter, confront, meet, come across, run intoHe ran rather than walked.A ,rather than B, 谓语动词与A一致As well asWould rather than Psychological and physicalhealth /well-being /well off A is disproportional to B Proportion : a great proportion ofRate: birth rate /death rate Ratio: ratio….1 to 3It is +被强调+thatOnly +状语，主句倒装。
定语从句不用that的情况定语从句不用that的情况定语从句中比较容易处理方面是，定语从句中“that”多可省略，表现为关系代词作宾语的情况，下面是店铺给大家整理的定语从句不用that的情况的相关内容，希望能给你带来帮助!（一）定语从句不用that的情况1、不能用that的情况介词前置时；非限定性定语从句中先行词本身是that多用who，不用that的情况先行词为anyone，one，ones时；先行词为those，he和people时；这些词代替指人，whom在定语从句中指人，"who"和“that”既可作主语又可作宾语（作宾语可以省略,who作宾语变为whom），that可以指人也可以指物, who不可指物。
在从句中所起作用如下：（1）Is he the man who/that wants to see you? 他是那个想见你的男人吗？（who/that在从句中作主语）（2）He is the man （whom/that） I saw yesterday. 他就是我昨天见到的那个人。
（whom/that在从句中作宾语）（3）The man whom you spoke to just now is our English teacher. 刚刚和你说话的那个男人是我们的英语老师。
（whom在从句中作宾语）注：who在定语从句中指人，作主语和宾语，作宾语时可省略；做及物动词或介词的宾语，可省略。
which，that 用来指物（有六种情况只可用that而不用which）(用作主语、宾语，作宾语时可以省略），例如：（1）The prosperity which/that had never appeared before took on in the countryside.农村出现了前所未有的繁荣。
（which/that在从句中作主语）（2）The package (which/that) you are carrying is about to comeunwrapped.你拿那个包裹快要散开了。
介词+关系代词的使用情况1. 用于这种情况的关系代词一般为which（指物）和whom（指人）。
在这种结构中，介词的选择非常关键，可以遵循以下四个原则：（1）根据定语从句中的谓语动词确定介词，其动词与介词搭配，构成动词短语。
例如：Is this the car for which you paid a high price? （pay for）这是你花大价钱买的车吗？In the dark street, there wasn’t a single perso n to whom she could turn for help. （turn to sb. for help）在黑暗的街上，她找不到一个人来帮助她。
The man with whom you shook hands just now is our English teacher. （shake hands with sb. ）刚才你和他握手的那个人是我们的英语老师。
（2）根据定语从句中的形容词确定介词，其形容词与介词搭配，构成形容词短语。
例如：The two things about which Karl Marx was not sure were the grammar and some of the idioms. （be sure about）马克思没有把握的两件事是：语法和习惯用法。
The teacher with whom the students in our class are popular is Mr Wang, our English teacher. （be popular with）在我们班，深受学生欢迎的是王老师－－我们的英语老师。
（3）根据定语从句修饰的先行词确定介词，其先行词往往是表示时间、地点、原因、方法、工具等的词，它们与介词之间有一定的联系。
当“介词＋关系代词”在定语从句中充当时间、地点、原因状语时，可分别用when, where, why替换。
英语定语从句的用法在英语中有很多种句式，今天让大家一起了解英语中定语从句的用法、接下来小编在这里给大家带来英语定语从句的用法，我们一起来看看吧!英语定语从句的用法定语从句由关系代词who、whom、whose、which、what、as 和关系副词where、when、why等引导，但须记住：1.what不能引导定语从句.2.关系词的分析须考虑它在定语从句中的成分。
一.指人的关系代词有who、whose、whom、that. 试分析：The old man who/whom /that we visited yesterday is a famous artist.Miss Wang is taking care of the child whose parents have gone to Beijing .The man with whom my father shook hands just now is our headmaster.(=The man who/whom that my father shook hands with just now is our headmaster.)注：A. 指人时有时只用who不宜用that。
1.先行词为one、ones或anyone(1)The comrade I want to learn from is the one who studies hard and works hard.(2)Anyone who breaks the law should be punished.2.先行词为these时These who are going to Beijing are the best students of our school.3.在there be 开头的句子中There is a student who wants to see you.4.一个句子中带有两个定语从句，其中一个定语从句的关系代词是that，另一个宜用who，以免重复。
专四定语从句语法点专四定语从句语法点引导语：定语从句，一个简单句跟在一名词或代词后（先行词）进行修饰限定，就叫做定语从句。
下面是店铺为大家精心整理的专四定语从句语法点，欢迎阅读！专四定语从句语法点关系代词：which（指sth 作主语或宾语），that（指sb或sth 作主语或宾语），who（指sb作主语或宾语），whom（指sb作宾语），whose（指sb或sth，作定语）,as（指sb,sth 作主语或宾语）;注意: 做宾语的时候，关系代词可以省略。
关系副词：when（指时间on which），where（指地点at which），why（指原因 for which）考点1. 先行词为人时引导词who和that(1) 只能用who不用that：1)当先行词为one(s), anyone, those 时；2)当先行词为人称代词时。
(2) 只能用that不用who：1)当主句已经出现who时。
2)关系代词在定语从句中作表语时。
1. He is quite worn out from years of hard work. He is not the man _that______ he was twenty years ago.A. whichB. thatC. whoD. whom考点2. 先行词为物时引导词that和which(1) 只能用that不用which：1)先行词为much, little, few, nothing, none, anything, no, all等不定代词。
2）先行词既有人又有物。
3）先行词被形容词的最高级或序数词修饰。
4）先行词被the very, the only, the last, just, all, any, every, no等修饰。
5）关系代词在从句中作表语。
6) 在疑问词who、which、what开头的句子中。
7) 主句是there be句型。
定语从句之—介词+关系代词词The Attributive Clause关系代词的用法；在复合句中修饰一个名词或代词的从句称为定语从句，一般紧跟在它所修饰的名词或代词后面。
定语从句所修饰的名词或代词称为先行词。
引导定语从句的关联词称为关系词，关系词有关系代词和关系副词。
关系代词有that ，which ，who ，whom ，whose 。
考查重点定语从句定语从句是中考必考考点之一，主要考查的是时态及宾语从句的语序，有时也会考查定语从句的引导词。
考查的主要形式是单项填空、完形填空、短文填空和完成句子。
阅读理解和书面表达肯定也会考查到定语从句。
因此学生要熟练掌握定语从句的用法。
关系代词引导的定语从句最为常见和常考。
命题趋势引导定语从句的关系词有关系代词和关系副词，关系代词和关系副词放在先行词及定语从句之间起连接作用，同时又作定语从句的重要成分。
常见的关系代词包括that， which， who（宾格whom，所有格whose）等关系副词包括where， when， why等根据定语从句与先行词的关系，定语从句可分为限制性定语从句及非限制性定语从句。
限制性定语从句：紧跟先行词，主句与从句不用逗号分开，从句不可省去。
非限制性定语从句：主句与从句之间有逗号分开，起补充说明作用，如省去，意思仍完整。
关系代词：who、that、whom、whose、which 做作主主语做宾语语1）指人：who/that 指物：which/that 2）指人：who/whom/that/省略指物：which/that/省略► The man who/tha t spoke at the ► The building which/that is ► I visited a scientist whose name is known all over themeeting is from Hong Kong.会上发言的人来自香港。
介词前置的定语从句
介词前置的定语从句
介词宾语前置句，所谓宾语前置句，就是通常作宾语的成分，置于谓语动词的前面，以示强调。
介词前置的定语从句
1.语法作用：“介词＋关系代词”在从句中主要起关系副词的作用，即在定语从句中充当状语：
（1）表示地点，时间和原因的“介词＋which”分别相当于where，when，why。
I have found the book in which the names of all the early satellites are mentioned.（SEFC 2A L. 55）（＝I have found the book. The names of all the early satellites are mentioned in it.）The earth on which／where we live is a planet.
I”ll never forget the day on which／when I joined the League.
I know a wood in which／where you can find roses.
Is there any reason for which／why you should have a holiday？
（2）way后常用that代替in which，也可省略that。
I really don”t like the way that he talks.
That was the way in which the old lady looked after us.
Do it the way I showed you.
2. “of＋which”起形容词的作用，相当于whose（用来指物），其词序通常是“n.＋of which”。
They live in a house whose door／the door of which opens to the south.
He”s written a book whose name／the name of which I”ve com- pletely forgotten.
3.可引导限制性定语从句和非限制性定语从句
There is a rocket by which the direction of the satellite can be changed.（SEFC 2A L. 55）
We carefully studied the photos，in which we could see signs of plant disease.（SEFC 2A L. 55）
4.介词的选择（选择介词时须考虑下列情况）
1）介词与先行词的.习惯搭配
There is no way in which it could be brought back to the earth.（SEFC 2A L. 55）（in与way是习惯搭配）
2）介词与定语从句中的动词，形容词的习惯搭配
These are the wires with which different machines are connected.（be connected with是习惯搭配）
The author with whom all of us are familiar will visit our compa-ny.（be familiar with是习惯搭配）
3）同形的先行词，或定语从句中的动词，形容词表示不同的含义时，要根据其含义选用不同的介词。
I can”t remember the age at which he won the prize.
That is the age in which people live in peace and happiness.
age在前句中意为“年岁”，与at搭配；在后句中意为“时期”，与in搭配。
4）复杂介词须保持其完整形式，常见的复杂介词有on the top of，in the middle of，in front of，in spite of，at the back of，because of等。
We took a photo of rocket，the length of which was about 30me- tres.（SEFC 2A L. 55）
Sound is a tool by means of which people communicate with each other.
They marched through the square，in the middle of which stood a monument.
5）短语动词中的介词不可与动词分开提至关系代词前。
常见的短语动词有listen to，look at，depend on，pay attention to，take
care of，look into，break into，get rid of，take part in，make use of，take hold of，catch hold of，catch up with，get along with，look forward to等。
此时可用which，who，whom或that，也可将他们省略。
（误）This is the girl of whom he will take care.
（正）This is the girl whom he will take careof.
6）当介词与定语从句中的动词或形容词联系紧密（但不是短语动词）时，介词也可放在动词或形容词的后面。
但当介词与从句中的动词或形容词联系不紧密时，则需将介词置于关系代词前。
比较：The space station which we drove to was in the desert.（SEFC 2A L. 55）
I”ll never forget the day in which I joined the Party.
后句中的in若置于句尾则有“孤零零”之感，这时宜将介词置于关系代词前；而前句中的to则可后置。
5.关系代词的选择
用于介词后的关系代词只有which，whom，前者指物，后者指人。
There are many research stations on the earth in which outer space is studied.（SEFC 2A L. 55）（which指代research stations）We questioned the pilot，from whom we learnt that no other planes had been seen.（SEFC 2A L. 55）（whom指代the pilot）
【介词前置的定语从句】。
